Every November, US water utilities mail a notification letter to every address served by a lead, galvanized-requiring-replacement, or unknown service line. The letter is federally required, it names the classification on record for that specific address, and it points the recipient at the utility’s lead pipe replacement program. The first wave landed in late 2025; the next lands this November, and the cycle repeats through the 10-year replacement window. For plumbers, the letter wave is the most predictable demand event in the trade: a dated, address-targeted mailing that sends thousands of building owners to search for replacement cost, program terms, and someone to do the work, on a schedule known months in advance.
This guide covers what the letter actually triggers, what recipients do in the days after it arrives, and what a plumbing company should have ready by November 1 to collect the demand.
What the letter says, and what the recipient does next
The required contents are consistent across utilities: the classification for the address (lead, GRR, or unknown), health information, exposure-reduction guidance, and how to learn about replacement, including the utility’s program. What it does not include is a price, a contractor, or a schedule for that specific address. Which is why the recipient’s next moves are searches and calls:
| Recipient’s question | Where it goes | Who wins the demand |
|---|---|---|
| ”Is this serious?” | Search: the rule, health guidance | Utility and agency pages; no contractor needed |
| ”What does replacement cost?” | Search: replacement cost, program terms | The local pages that answer with real numbers |
| ”Will the city pay for it?” | Utility program page, then a call | The contractor listed, referred, or already known |
| ”Who can do this?” | Search: local plumber plus lead line | Whoever ranks locally and answers the phone |
| ”Is my landlord handling this?” | Tenants forward the letter to owners and managers | The contractor already talking to that management company |
Two things to notice. First, cost and program terms carry the intent: a recipient asking those questions is inside a buying decision, not researching chemistry. Second, the last row is the sleeper. In multi-family buildings the letters reach tenants, who forward them to management companies, and a management company holding forty letters across its portfolio is the single most valuable caller the wave produces. Working those accounts before the letters land is the difference between fielding one homeowner call and signing a portfolio; the inventory guide covers finding them.
The wave rewards whoever answered first
The letters create the questions, but the utility does not answer the commercial ones: it will not quote the private side, name a contractor, or tell an owner what their block’s program schedule means for them. The plumber who publishes those answers for their own market, this program’s actual terms, this city’s actual cost range, this year’s actual dates, becomes the obvious call. That is a one-week content and process job, done once, refreshed each October.
The “ready by November 1” checklist
- A program answer. One paragraph, in your own words, on your local utility’s program: who pays for the private side, whether a rebate or financing exists, and the program’s contact. Recycled every year with the dates updated.
- A price range you will stand behind. Publish the honest local range for a private-side replacement by surface type. Owners are searching cost; the page with a number beats the page with a form.
- A same-week assessment slot. The letter’s urgency fades in about two weeks. Hold calendar capacity in November for assessment visits, and quote at the visit.
- The trenchless answer. Recipients fear a destroyed lawn or driveway. Explain pull-through replacement and when it applies; it is the objection-killer for this job.
- A management-company mailer. One page, sent to the management companies whose buildings sit on the inventory: how many of their addresses are classified, what the program covers, and a portfolio walkthrough offer. Send it in October, before their tenants start forwarding letters.
- Next-year capture. Every November caller who does not buy is classified demand with a known re-trigger date. Log them; the same letter arrives next year.
The part that runs year-round
The letter wave is seasonal; the classifications behind it are not. Addresses resolve from unknown to lead all year, program terms change, public-side crews finish blocks and leave private sides open. Watching those state changes daily, and matching the multi-family and commercial addresses to the accounts behind them, is what FieldClients does for plumbing members: each signal routed with a verified decision-maker email on every lead, and a company phone where listed, to a capped number of members per trade and market. The November wave is the easy month. The feed is the other eleven.